Grinding-wheel-truing tool



E. R. CONNERS. GRINDING WHEEL mums MACHI'NE.

- APPL icAnoN FILED Jun! 9. 1920'.

Patented July 5,1921.

2 SHEETS-SHEETI 3 vibe-14 :0

Witnaoo 61 than? E. R. CONNERS.

GRINDING WHEEL TRUlNG MACHINE.

APPLICATION FILED JULY 9. 1920.

1,383,601 Patented July 5, 1921.

2 SHEETS-SHEET 2- a ywantoz Gttozmuy EDWARD R. .co NERs, or CINCINNATI,

Fries.

MAcIIINn' & 'rooL COMPANY, or CINCINNATI, OHIO, A CORPORATION oroHIo.

s tINnING-wIIEEL-TRuING 'roon. Z

T 0 all whom it may concern: I

Beit known that I, ED ARD R. CoNNnRs, a citizen of the United States, and residing at Cincinnati, in thecounty of Hamilton and State of Ohio, have invented a new and useful Improvement in. GrindinglVheeL Truing Tools, of which the fication is afull disclosure; V This invention relates to a: device for grinding, truing and smoothing emery wheels or the like, and has for its object to provide a tool which, when held against the rotating wheel to be ground, will perform the operation quickly and: accurately.

'Another object of the invention is to provide an emery wheel truing tool with a rotative abrading. wheel reciprocating transversely upon its axis in. its rotation about the axis when pressed'against a revolving emery or grinding wheel fromwhich the abrading wheel receives its motion, whereby the operator can hold the tool in a fixed position again-st the emery wheel with the abrading wheels translatable across the entire width of surface to be trued for producing a straighter plane finish thereto.

following specigrinding, or truing elements, that the cuttings will not clog the same, and an additional object is to interposesmoothing elements between the-said grinding elements 'in such a manner asto' insure a uniform smoothmgof the surface and straight face ground during the grind-' 0f the wheel to be ing operation.

' Other objects and certain advantages will. special refer ence is made to the drawings forming a part appear in the description and of this specification in which,

Figure 1 is a plan section of my device. Fig. 2 is a face view'of-one of'the fluted grinding disks. I

Fig. 3 is an edge viewfof the disk shown in Fig. 2, the position of the. smoothing disks being shown in dot-and-dash lines.-

Fig. 4 is a detail view of-the mandrel. I

Fig.-5 is a diagrammatic view showing the method of using my grinding device.

Fig. 6 is a plan section of a modified form.

Fig. 7 is a central vertical section of the same.

Fig. 8 is an end elevation, and,

Fig. 9 is a detail of the shaft and miter groove thereon.

disk holding Specification of Letters Patent.

- Application filed July 9, 1920.

Serial No. 395,025 v The numerall designates a fork, formed integral with a-handle 2, and between-the a-rms'the fork is fastened as at 3, a shaft 4: provided at its middle with a circumferential or annular miter-groove 5. Surroundingsaid shaft, and adapted for rotation and reciprocation thereon, is a mandrel 6 in the form of'a hollow tube, the same having a central annular boss or hub 7 formed thereupon, and thesaid mandrel isprovided at its ends with exterior screw. threads 8. A series of fiuted-or corrugated grinding, disks9, and smoothing disks 10 having central openings 11, are placed upon the mandrel 5 and on each side of the boss '7, each series being composed of alternate grinding and smoothing disks, and as units providing abrading wheelssclamped against-the boss 7, by washers 12, and'nut's 13 engaging'the' threads 8, rigidly securing the abrading' wheels upon the mandrel.

Passed July 5; 1921.

OHIO,.ASSIG1\TOR T10 T'HE'EREGISION .TRUING Screwed into the boss 7, of the mandrel I 7 is pin 14, designedin, conjunction with the groove, 5, to cause the mandrel 6 and the Another object is to so construct the vith the wheel of the grinding disks re- Y of the grinding and smoothing gdisks allowfor the carrying away of the cuttings.

. It will be seen that as the abrading wheels 7' rotate and reciprocateupon the shaft 4, the edges 17 have a shear ng action upon the surface of the wheel being ground, while the peripheries of the disks 10 tend to. smooth the wheel as the grinding operation pro ceeds.-".

The number ofv disks composing the abrading wheel or wheels is optional and largely depending upon the size"- of the grinding wheel to be trued or operated upon, but it is desirable to have theabrading wheel with each revolution move or sweep back and forth across the full face width of the grinding wheel, without being required to change the position of the abrading tool.

The tool can be used by an :unskilled operator and a straight or plane surface can be produced by the grinding wheel.

.The frame of the abrading tool is provided with depending lugs 18 at the lower extremities of the arms ofthe fork l for engagement with the tool rest or support of the grinding machine, enabling the abrading tool to be firmly anchored or positioned in relation to the grinding wheel and wedged against the surface to be trued, for obtaining the required abrading pressure.

As the operator is relieved from any manual feeding of the toolacross the face of the. grinding wheel, a straight surface truing is assured, whether. parallel or at an angle to the aXis of the grinding wheel.

The screw 14 is disposed centrally of the mandrel, which permits the annular inclined groove 5 to be likewise disposed centrally of the shaft, so that the mandrel completely houses the roove at its limits of reciprocation, protecting the parts from the abrading tailings and dust, which could cause undue wear to the parts.

The tool is anchored upon the tool rest or support of the grinding machine and the handle is moved upwardly, bringing the abrading wheel against the emery wheel under a required pressure. The abrading wheel, through its peripheral frictional engagement with the surface of the emery wheel, is rotated at a rate proportional to the rotation .and diameter of the emery wheel, and as it rotates about its axis, it is translated transversely upon the axis in motions of reciprocation and thus is fed crosswise of the emery wheel surface. The operator holding the tool in a fixed position enables the grinding wheel surface to be finished inxa straight line crosswise of the surface engaged.

A modified form of my device is shown in Figs. 6 to 9 inclusive, in which the numeral 20 designates the fork, substantially similar to the fork 1, but is provided with a socket 21, into which is screwedthe handle 22 having a finishing cap 23 at its opposite end. The arms 20 of thefork have slots 24 formed therein, and the flattened ends of the shaft 25 engage the said slots and are held thus :engaged by split keys 26 as shown. Centrally of the shaft 25 is a miter groove 27, and loosely surrounding said shaft and covering said groove, is a tubular mandrel 28, having a Wrench flange 29 at its. one

extremity, which acts as a stop against which a series of alternategear-like cutting The action of the wheels 40 and smoothing disks 41, are clamped by the threaded nut 30; centrally of the tubular mandrel, is an opening 31, for the reception of a steel ball 32, half of the same projecting into the, miter groove. Surrounding the mandrel is a split tubular collar 33, upon which the disks and 41, are placed and clamped as above described. tool is similar to that of the first form.

Having described my invention, I claim:

1. In a grinding and smoothing tool, the combination of a fork member provided with a handle, a shaft rigidly held between the arms of said fork, a circumferential groove placed centrally and. at an angle of to the long axis of said shaft, a tubular mandrel mounted for rotation and oscillation upon. said shaft, a pin traversing the wall of said mandrel, and. projecting into.

said groove, and grinding elements rigidly mounted upon said mandrel. f

2. In a tool of the class described, a handle having a bifurcated end providing a bearing, a non-rotatable shaft supported by said handle bearing, having an annular in-' clined groove about its periphery, a rotatable abrading wheel journaled upon said shaft and cooperating, with said annular groove, whereby said Wheel in its rotation is reciprocated upon said shaft.

3. In a tool of the class described, a handle member, a shaft fixed upon said handle member, having an annular inclined groove about its periphery, a sleeverotatable and slidable longitudinally upon said shaft, having an element engaged into said annular groove of said shaft, and abrading disks clamped upon the sleeve.

4. In a tool ofthe class described, a handle, a mandrel removably supported in said handle and provided with an annular inclined groove aboutits periphery, abrading disks having a removable hub, a sleeve concentric within said hub, secured thereto and therewith slidable upon said mandrel,

said sleeve having a ball confining aperture.

therethrough and a ball in said sleeve aperture engaged in said annular inclined groove.

In witness whereof, I' hereunto subscribe my name, as attested by the two subscribing witnesses.

- EDl/VARD R. CONNERS. Witnesses: L. A. Buc

J. C. JUNIUs. 

